A coat of ACE brand "high hiding" white.
Applied with a $15 airless sprayer and a roller. (sprayer sucked. I got what I paid for) Left a glossy, slightly textured finish, which is okay with me since the surface is so irregular anyway.

I intend to replace the original crusty marker lights with LED ones. Removed the cross mirrors but left the wiring for now. Doesn't it look aerodynamic now? A cinder block hurtling through space! Final paint scheme not sure yet. I'm thinking some sort of graphics over the white rather that monolithic stripes. What do you think? Flames? Skulls? Unicorns? Flaming skulls? Flaming Unicorns? The mind reels...